FBI Had Spy in Trump Campaign, Letter Reaffirming Testimony Reveals

President Donald Trump returns to the White House in Washington on May 15, 2018, from Walter Reed National Military Medical Center after visiting First Lady Melania Trump who underwent surgery in what aides called a 'benign' kidney condition. Samira Bouaou/The Epoch Times

A previously undisclosed letter from the attorney for Fusion GPS co-founder Glenn Simpson surfaced on Tuesday confirming anonymous reports that the FBI had a spy in the Trump campaign.

Leaks to the media in recent weeks fueled speculation that the FBI had an informant interacting with the Trump campaign, but the sources remained anonymous, relegating articles on the subject to the opinion pages.